/* ================================
   GOAI - Global Operations AI
   Landing Page CSS
   ================================ */

/* === 1. CSS VARIABLES & RESET === */
:root {
  --primary: #6366F1;
  --primary-dark: #4F46E5;
  --secondary: #10B981;
  --secondary-dark: #059669;
  --accent: #F59E0B;
  --accent-dark: #D97706;
  --dark: #0F172A;
  --dark-light: #1E293B;
  --light: #F8FAFC;
  --light-gray: #F1F5F9;
  --gray: #64748B;
  --white: #FFFFFF;

  --gradient-primary: linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);
  --gradient-secondary: linear-gradient(135deg, #10B981 0%, #059669 100%);
  --gradient-accent: linear-gradient(135deg, #F59E0B 0%, #EF4444 100%);
  --gradient-hero: linear-gradient(135deg, #0F172A 0%, #1E293B 50%, #334155 100%);

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  --radius-sm: 0.375rem;
  --radius: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;

  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: var(--dark);
  background-color: var(--white);
  overflow-x: hidden;
}

/* === 2. UTILITY CLASSES === */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
}

.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* === 3. NAVBAR === */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-md);
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.logo {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.logo-text {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--dark);
  letter-spacing: -0.02em;
}

.ai-highlight {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo-subtitle {
  font-size: 0.75rem;
  color: var(--gray);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--dark);
  font-weight: 500;
  font-size: 0.9375rem;
  transition: var(--transition);
  position: relative;
}

.nav-links a:not(.btn-nav):hover {
  color: var(--primary);
}

.nav-links a:not(.btn-nav)::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width 0.3s ease;
}

.nav-links a:not(.btn-nav):hover::after {
  width: 100%;
}

.btn-nav {
  background: var(--gradient-primary);
  color: var(--white);
  padding: 0.625rem 1.5rem;
  border-radius: var(--radius-lg);
  font-weight: 600;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.btn-nav:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* === 4. HERO SECTION === */
.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  background: var(--gradient-hero);
  overflow: hidden;
  padding: 4rem 0;
}

.hero-background {
  position: absolute;
  inset: 0;
  overflow: hidden;
  z-index: 0;
}

.gradient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  animation: float 8s ease-in-out infinite;
}

.orb-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, #6366F1 0%, transparent 70%);
  top: -10%;
  right: -10%;
  animation-delay: 0s;
}

.orb-2 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, #10B981 0%, transparent 70%);
  bottom: -15%;
  left: -10%;
  animation-delay: 2s;
}

.orb-3 {
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, #F59E0B 0%, transparent 70%);
  top: 40%;
  left: 50%;
  animation-delay: 4s;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0) translateX(0);
  }
  25% {
    transform: translateY(-20px) translateX(10px);
  }
  50% {
    transform: translateY(-10px) translateX(-10px);
  }
  75% {
    transform: translateY(-30px) translateX(5px);
  }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
  text-align: center;
  margin: 0 auto;
  animation: slideUp 1s ease-out;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-xl);
  color: var(--white);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 2rem;
}

.badge-icon {
  font-size: 1.25rem;
}

.hero-title {
  font-size: 3.75rem;
  font-weight: 800;
  line-height: 1.1;
  color: var(--white);
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

.hero-description {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 3rem;
  line-height: 1.8;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 4rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--white);
  box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-xl);
}

.btn-primary.loading {
  pointer-events: none;
  opacity: 0.8;
}

.btn-primary.loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  top: 50%;
  left: 50%;
  margin-left: -8px;
  margin-top: -8px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: var(--white);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.btn-full {
  width: 100%;
  justify-content: center;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3rem;
  padding: 2rem;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
}

.stat {
  text-align: center;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 0.5rem;
  background: var(--gradient-secondary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.8);
  font-weight: 500;
}

/* === 5. SERVICES SECTION === */
.services {
  padding: 6rem 0;
  background: var(--light);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 4rem;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--dark);
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.section-description {
  font-size: 1.125rem;
  color: var(--gray);
  line-height: 1.8;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.service-card {
  position: relative;
  background: var(--white);
  padding: 2.5rem;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.service-card.featured {
  border: 2px solid var(--secondary);
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.02) 0%, rgba(5, 150, 105, 0.05) 100%);
}

.featured-badge {
  position: absolute;
  top: -12px;
  right: 2rem;
  background: var(--gradient-secondary);
  color: var(--white);
  padding: 0.375rem 1rem;
  border-radius: var(--radius-lg);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  box-shadow: var(--shadow-md);
}

.service-icon {
  margin-bottom: 1.5rem;
}

.service-icon svg {
  width: 48px;
  height: 48px;
}

.service-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 1rem;
}

.service-description {
  font-size: 1rem;
  color: var(--gray);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.service-features {
  list-style: none;
  padding: 0;
}

.service-features li {
  font-size: 0.9375rem;
  color: var(--dark);
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--light-gray);
}

.service-features li:last-child {
  border-bottom: none;
}

/* === 6. BENEFITS SECTION === */
.benefits {
  padding: 6rem 0;
  background: var(--white);
}

.benefits-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.benefits-list {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  margin-top: 2rem;
}

.benefit-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.benefit-icon {
  font-size: 2rem;
  flex-shrink: 0;
}

.benefit-content h4 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 0.5rem;
}

.benefit-content p {
  font-size: 1rem;
  color: var(--gray);
  line-height: 1.6;
}

.benefits-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.visual-card {
  background: var(--gradient-primary);
  padding: 3rem;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-width: 400px;
}

.visual-stat {
  text-align: center;
  margin-bottom: 2rem;
}

.visual-number {
  font-size: 4rem;
  font-weight: 900;
  color: var(--white);
  display: block;
  margin-bottom: 0.5rem;
}

.visual-label {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.9);
  font-weight: 600;
}

.visual-graph {
  display: flex;
  gap: 1rem;
  align-items: flex-end;
  height: 150px;
}

.graph-bar {
  flex: 1;
  background: rgba(255, 255, 255, 0.3);
  border-radius: var(--radius);
  transition: var(--transition);
}

.graph-bar:hover {
  background: rgba(255, 255, 255, 0.5);
}

/* === 7. CONTACT SECTION === */
.contact {
  padding: 6rem 0;
  background: var(--light);
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.contact-info .section-title {
  text-align: left;
}

.contact-info .section-description {
  text-align: left;
  margin-bottom: 2rem;
}

.contact-features {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-feature {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1rem;
  color: var(--dark);
}

.contact-feature svg {
  flex-shrink: 0;
}

.contact-form-wrapper {
  background: var(--white);
  padding: 3rem;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--dark);
  letter-spacing: 0.01em;
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 0.875rem 1rem;
  border: 2px solid var(--light-gray);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: inherit;
  color: var(--dark);
  background: var(--white);
  transition: var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group input.error,
.form-group select.error,
.form-group textarea.error {
  border-color: #EF4444;
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.error-message {
  color: #EF4444;
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

.form-privacy {
  font-size: 0.8125rem;
  color: var(--gray);
  text-align: center;
  margin-top: 0.5rem;
  line-height: 1.5;
}

.success-message {
  text-align: center;
  padding: 3rem;
  animation: fadeIn 0.5s ease-in;
}

.success-message svg {
  margin: 0 auto 1.5rem;
}

.success-message h3 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 1rem;
}

.success-message p {
  font-size: 1rem;
  color: var(--gray);
  line-height: 1.6;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* === 8. FOOTER === */
.footer {
  background: var(--gradient-hero);
  color: var(--white);
  padding: 4rem 0 2rem;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand .logo-text {
  color: var(--white);
  margin-bottom: 1rem;
  display: inline-block;
}

.footer-description {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.9375rem;
  line-height: 1.6;
  max-width: 350px;
}

.footer-column h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--white);
}

.footer-column ul {
  list-style: none;
  padding: 0;
}

.footer-column ul li {
  margin-bottom: 0.75rem;
}

.footer-column ul li a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  font-size: 0.9375rem;
  transition: var(--transition);
}

.footer-column ul li a:hover {
  color: var(--white);
  padding-left: 0.5rem;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.875rem;
}

.footer-domain {
  margin-top: 0.5rem;
  color: rgba(255, 255, 255, 0.9);
  font-weight: 600;
}

/* === 9. RESPONSIVE DESIGN === */

@media (max-width: 1024px) {
  .container {
    padding: 0 1.5rem;
  }

  .hero-title {
    font-size: 3rem;
  }

  .benefits-content,
  .contact-wrapper {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .benefits-visual {
    order: -1;
  }

  .footer-content {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    gap: 1rem;
  }

  .nav-links a {
    font-size: 0.875rem;
  }

  .btn-nav {
    padding: 0.5rem 1rem;
  }

  .hero {
    min-height: auto;
    padding: 3rem 0;
  }

  .hero-title {
    font-size: 2.25rem;
  }

  .hero-description {
    font-size: 1.125rem;
  }

  .hero-stats {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }

  .contact-form-wrapper {
    padding: 2rem;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }

  .logo-text {
    font-size: 1.5rem;
  }

  .nav-links {
    gap: 0.75rem;
  }

  .hero-title {
    font-size: 1.875rem;
  }

  .hero-description {
    font-size: 1rem;
  }

  .hero-cta {
    flex-direction: column;
    width: 100%;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .contact-form-wrapper {
    padding: 1.5rem;
  }
}